win32/kernel32.c

   1 /*
   2  * KERNEL32 thunks and other undocumented stuff
   3  *
   4  * Copyright 1997-1998 Marcus Meissner
   5  * Copyright 1998      Ulrich Weigand
   6  *
   7  */
   8
   9 #include <string.h>
  10
  11 #include "windef.h"
  12 #include "winbase.h"
  13 #include "wine/winbase16.h"
  14 #include "callback.h"
  15 #include "task.h"
  16 #include "user.h"
  17 #include "heap.h"
  18 #include "module.h"
  19 #include "neexe.h"
  20 #include "process.h"
  21 #include "stackframe.h"
  22 #include "heap.h"
  23 #include "selectors.h"
  24 #include "task.h"
  25 #include "win.h"
  26 #include "file.h"
  27 #include "debug.h"
  28 #include "flatthunk.h"
  29 #include "syslevel.h"
  30 #include "winerror.h"
  31
  32
  33 /***********************************************************************
  34  *                                                                     *
  35  *                 Win95 internal thunks                               *
  36  *                                                                     *
  37  ***********************************************************************/
  38
  39 /***********************************************************************
  40  * Generates a FT_Prolog call.
  41  *
  42  *  0FB6D1                  movzbl edx,cl
  43  *  8B1495xxxxxxxx          mov edx,[4*edx + targetTable]
  44  *  68xxxxxxxx              push FT_Prolog
  45  *  C3                      lret
  46  */
  47 static void _write_ftprolog(LPBYTE relayCode ,DWORD *targetTable) {
  48         LPBYTE  x;
  49
  50         x       = relayCode;
  51         *x++    = 0x0f;*x++=0xb6;*x++=0xd1; /* movzbl edx,cl */
  52         *x++    = 0x8B;*x++=0x14;*x++=0x95;*(DWORD**)x= targetTable;
  53         x+=4;   /* mov edx, [4*edx + targetTable] */
  54         *x++    = 0x68; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"FT_Prolog");
  55         x+=4;   /* push FT_Prolog */
  56         *x++    = 0xC3;         /* lret */
  57         /* fill rest with 0xCC / int 3 */
  58 }
  59
  60 /***********************************************************************
  61  *      _write_qtthunk                                  (internal)
  62  * Generates a QT_Thunk style call.
  63  *
  64  *  33C9                    xor ecx, ecx
  65  *  8A4DFC                  mov cl , [ebp-04]
  66  *  8B148Dxxxxxxxx          mov edx, [4*ecx + targetTable]
  67  *  B8yyyyyyyy              mov eax, QT_Thunk
  68  *  FFE0                    jmp eax
  69  */
  70 static void _write_qtthunk(
  71         LPBYTE relayCode,       /* [in] start of QT_Thunk stub */
  72         DWORD *targetTable      /* [in] start of thunk (for index lookup) */
  73 ) {
  74         LPBYTE  x;
  75
  76         x       = relayCode;
  77         *x++    = 0x33;*x++=0xC9; /* xor ecx,ecx */
  78         *x++    = 0x8A;*x++=0x4D;*x++=0xFC; /* movb cl,[ebp-04] */
  79         *x++    = 0x8B;*x++=0x14;*x++=0x8D;*(DWORD**)x= targetTable;
  80         x+=4;   /* mov edx, [4*ecx + targetTable */
  81         *x++    = 0xB8; *(DWORD*)x = (DWORD)GetProcAddress(GetModuleHandleA("KERNEL32"),"QT_Thunk");
  82         x+=4;   /* mov eax , QT_Thunk */
  83         *x++    = 0xFF; *x++ = 0xE0;    /* jmp eax */
  84         /* should fill the rest of the 32 bytes with 0xCC */
  85 }
  86
  87 /***********************************************************************
  88  *           _loadthunk
  89  */
  90 static LPVOID _loadthunk(LPCSTR module, LPCSTR func, LPCSTR module32,
  91                          struct ThunkDataCommon *TD32, DWORD checksum)
  92 {
  93     struct ThunkDataCommon *TD16;
  94     HMODULE hmod;
  95     int ordinal;
  96
  97     if ((hmod = LoadLibrary16(module)) <= 32)
  98     {
  99         ERR(thunk, "(%s, %s, %s): Unable to load '%s', error %d\n",
 100                    module, func, module32, module, hmod);
 101         return 0;
 102     }
 103
 104     if (   !(ordinal = NE_GetOrdinal(hmod, func))
 105         || !(TD16 = PTR_SEG_TO_LIN(NE_GetEntryPointEx(hmod, ordinal, FALSE))))
 106     {
 107         ERR(thunk, "(%s, %s, %s): Unable to find '%s'\n",
 108                    module, func, module32, func);
 109         return 0;
 110     }
 111
 112     if (TD32 && memcmp(TD16->magic, TD32->magic, 4))
 113     {
 114         ERR(thunk, "(%s, %s, %s): Bad magic %c%c%c%c (should be %c%c%c%c)\n",
 115                    module, func, module32,
 116                    TD16->magic[0], TD16->magic[1], TD16->magic[2], TD16->magic[3],
 117                    TD32->magic[0], TD32->magic[1], TD32->magic[2], TD32->magic[3]);
 118         return 0;
 119     }
 120
 121     if (TD32 && TD16->checksum != TD32->checksum)
 122     {
 123         ERR(thunk, "(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 124                    module, func, module32, TD16->checksum, TD32->checksum);
 125         return 0;
 126     }
 127
 128     if (!TD32 && checksum && checksum != *(LPDWORD)TD16)
 129     {
 130         ERR(thunk, "(%s, %s, %s): Wrong checksum %08lx (should be %08lx)\n",
 131                    module, func, module32, *(LPDWORD)TD16, checksum);
 132         return 0;
 133     }
 134
 135     return TD16;
 136 }
 137
 138 /***********************************************************************
 139  *           GetThunkStuff    (KERNEL32.53)
 140  */
 141 LPVOID WINAPI GetThunkStuff(LPSTR module, LPSTR func)
 142 {
 143     return _loadthunk(module, func, "<kernel>", NULL, 0L);
 144 }
 145
 146 /***********************************************************************
 147  *           GetThunkBuff    (KERNEL32.52)
 148  * Returns a pointer to ThkBuf in the 16bit library SYSTHUNK.DLL.
 149  */
 150 LPVOID WINAPI GetThunkBuff(void)
 151 {
 152     return GetThunkStuff("SYSTHUNK.DLL", "ThkBuf");
 153 }
 154
 155 /***********************************************************************
 156  *              ThunkConnect32          (KERNEL32)
 157  * Connects a 32bit and a 16bit thunkbuffer.
 158  */
 159 UINT WINAPI ThunkConnect32(
 160         struct ThunkDataCommon *TD,  /* [in/out] thunkbuffer */
 161         LPSTR thunkfun16,            /* [in] win16 thunkfunction */
 162         LPSTR module16,              /* [in] name of win16 dll */
 163         LPSTR module32,              /* [in] name of win32 dll */
 164         HMODULE hmod32,            /* [in] hmodule of win32 dll */
 165         DWORD dwReason               /* [in] initialisation argument */
 166 ) {
 167     BOOL directionSL;
 168
 169     if (!lstrncmpA(TD->magic, "SL01", 4))
 170     {
 171         directionSL = TRUE;
 172
 173         TRACE(thunk, "SL01 thunk %s (%lx) <- %s (%s), Reason: %ld\n",
 174                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 175     }
 176     else if (!lstrncmpA(TD->magic, "LS01", 4))
 177     {
 178         directionSL = FALSE;
 179
 180         TRACE(thunk, "LS01 thunk %s (%lx) -> %s (%s), Reason: %ld\n",
 181                      module32, (DWORD)TD, module16, thunkfun16, dwReason);
 182     }
 183     else
 184     {
 185         ERR(thunk, "Invalid magic %c%c%c%c\n",
 186                    TD->magic[0], TD->magic[1], TD->magic[2], TD->magic[3]);
 187         return 0;
 188     }
 189
 190     switch (dwReason)
 191     {
 192         case DLL_PROCESS_ATTACH:
 193         {
 194             struct ThunkDataCommon *TD16;
 195             if (!(TD16 = _loadthunk(module16, thunkfun16, module32, TD, 0L)))
 196                 return 0;
 197
 198             if (directionSL)
 199             {
 200                 struct ThunkDataSL32 *SL32 = (struct ThunkDataSL32 *)TD;
 201                 struct ThunkDataSL16 *SL16 = (struct ThunkDataSL16 *)TD16;
 202                 struct SLTargetDB *tdb;
 203
 204                 if (SL16->fpData == NULL)
 205                 {
 206                     ERR(thunk, "ThunkConnect16 was not called!\n");
 207                     return 0;
 208                 }
 209
 210                 SL32->data = SL16->fpData;
 211
 212                 tdb = HeapAlloc(GetProcessHeap(), 0, sizeof(*tdb));
 213                 tdb->process = PROCESS_Current();
 214                 tdb->targetTable = (DWORD *)(thunkfun16 + SL32->offsetTargetTable);
 215
 216                 tdb->next = SL32->data->targetDB;   /* FIXME: not thread-safe! */
 217                 SL32->data->targetDB = tdb;
 218
 219                 TRACE(thunk, "Process %08lx allocated TargetDB entry for ThunkDataSL %08lx\n",
 220                              (DWORD)PROCESS_Current(), (DWORD)SL32->data);
 221             }
 222             else
 223             {
 224                 struct ThunkDataLS32 *LS32 = (struct ThunkDataLS32 *)TD;
 225                 struct ThunkDataLS16 *LS16 = (struct ThunkDataLS16 *)TD16;
 226
 227                 LS32->targetTable = PTR_SEG_TO_LIN(LS16->targetTable);
 228
 229                 /* write QT_Thunk and FT_Prolog stubs */
 230                 _write_qtthunk ((LPBYTE)TD + LS32->offsetQTThunk,  LS32->targetTable);
 231                 _write_ftprolog((LPBYTE)TD + LS32->offsetFTProlog, LS32->targetTable);
 232             }
 233             break;
 234         }
 235
 236         case DLL_PROCESS_DETACH:
 237             /* FIXME: cleanup */
 238             break;
 239     }
 240
 241     return 1;
 242 }
 243
 244 /**********************************************************************
 245  *              QT_Thunk                        (KERNEL32)
 246  *
 247  * The target address is in EDX.
 248  * The 16 bit arguments start at ESP+4.
 249  * The number of 16bit argumentbytes is EBP-ESP-0x44 (68 Byte thunksetup).
 250  * [ok]
 251  */
 252 REGS_ENTRYPOINT(QT_Thunk)
 253 {
 254     CONTEXT context16;
 255     DWORD argsize;
 256     THDB *thdb = THREAD_Current();
 257
 258     memcpy(&context16,context,sizeof(context16));
 259
 260     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 261     IP_reg(&context16)  = LOWORD(EDX_reg(context));
 262     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 263                            + (WORD)&((STACK16FRAME*)0)->bp;
 264
 265     argsize = EBP_reg(context)-ESP_reg(context)-0x44;
 266
 267     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 268             (LPBYTE)ESP_reg(context)+4, argsize );
 269
 270     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 271     EDX_reg(context) = HIWORD(EAX_reg(context));
 272     EAX_reg(context) = LOWORD(EAX_reg(context));
 273 }
 274
 275
 276 /**********************************************************************
 277  *              FT_Prolog                       (KERNEL32.233)
 278  *
 279  * The set of FT_... thunk routines is used instead of QT_Thunk,
 280  * if structures have to be converted from 32-bit to 16-bit
 281  * (change of member alignment, conversion of members).
 282  *
 283  * The thunk function (as created by the thunk compiler) calls
 284  * FT_Prolog at the beginning, to set up a stack frame and
 285  * allocate a 64 byte buffer on the stack.
 286  * The input parameters (target address and some flags) are
 287  * saved for later use by FT_Thunk.
 288  *
 289  * Input:  EDX  16-bit target address (SEGPTR)
 290  *         CX   bits  0..7   target number (in target table)
 291  *              bits  8..9   some flags (unclear???)
 292  *              bits 10..15  number of DWORD arguments
 293  *
 294  * Output: A new stackframe is created, and a 64 byte buffer
 295  *         allocated on the stack. The layout of the stack
 296  *         on return is as follows:
 297  *
 298  *  (ebp+4)  return address to caller of thunk function
 299  *  (ebp)    old EBP
 300  *  (ebp-4)  saved EBX register of caller
 301  *  (ebp-8)  saved ESI register of caller
 302  *  (ebp-12) saved EDI register of caller
 303  *  (ebp-16) saved ECX register, containing flags
 304  *  (ebp-20) bitmap containing parameters that are to be converted
 305  *           by FT_Thunk; it is initialized to 0 by FT_Prolog and
 306  *           filled in by the thunk code before calling FT_Thunk
 307  *  (ebp-24)
 308  *    ...    (unclear)
 309  *  (ebp-44)
 310  *  (ebp-48) saved EAX register of caller (unclear, never restored???)
 311  *  (ebp-52) saved EDX register, containing 16-bit thunk target
 312  *  (ebp-56)
 313  *    ...    (unclear)
 314  *  (ebp-64)
 315  *
 316  *  ESP is EBP-68 on return.
 317  *
 318  */
 319
 320 REGS_ENTRYPOINT(FT_Prolog)
 321 {
 322     /* Pop return address to thunk code */
 323     EIP_reg(context) = STACK32_POP(context);
 324
 325     /* Build stack frame */
 326     STACK32_PUSH(context, EBP_reg(context));
 327     EBP_reg(context) = ESP_reg(context);
 328
 329     /* Allocate 64-byte Thunk Buffer */
 330     ESP_reg(context) -= 64;
 331     memset((char *)ESP_reg(context), '\0', 64);
 332
 333     /* Store Flags (ECX) and Target Address (EDX) */
 334     /* Save other registers to be restored later */
 335     *(DWORD *)(EBP_reg(context) -  4) = EBX_reg(context);
 336     *(DWORD *)(EBP_reg(context) -  8) = ESI_reg(context);
 337     *(DWORD *)(EBP_reg(context) - 12) = EDI_reg(context);
 338     *(DWORD *)(EBP_reg(context) - 16) = ECX_reg(context);
 339
 340     *(DWORD *)(EBP_reg(context) - 48) = EAX_reg(context);
 341     *(DWORD *)(EBP_reg(context) - 52) = EDX_reg(context);
 342
 343     /* Push return address back onto stack */
 344     STACK32_PUSH(context, EIP_reg(context));
 345 }
 346
 347 /**********************************************************************
 348  *              FT_Thunk                        (KERNEL32.234)
 349  *
 350  * This routine performs the actual call to 16-bit code,
 351  * similar to QT_Thunk. The differences are:
 352  *  - The call target is taken from the buffer created by FT_Prolog
 353  *  - Those arguments requested by the thunk code (by setting the
 354  *    corresponding bit in the bitmap at EBP-20) are converted
 355  *    from 32-bit pointers to segmented pointers (those pointers
 356  *    are guaranteed to point to structures copied to the stack
 357  *    by the thunk code, so we always use the 16-bit stack selector
 358  *    for those addresses).
 359  *
 360  *    The bit #i of EBP-20 corresponds here to the DWORD starting at
 361  *    ESP+4 + 2*i.
 362  *
 363  * FIXME: It is unclear what happens if there are more than 32 WORDs
 364  *        of arguments, so that the single DWORD bitmap is no longer
 365  *        sufficient ...
 366  */
 367
 368 REGS_ENTRYPOINT(FT_Thunk)
 369 {
 370     DWORD mapESPrelative = *(DWORD *)(EBP_reg(context) - 20);
 371     DWORD callTarget     = *(DWORD *)(EBP_reg(context) - 52);
 372
 373     CONTEXT context16;
 374     DWORD i, argsize;
 375     LPBYTE newstack, oldstack;
 376     THDB *thdb = THREAD_Current();
 377
 378     memcpy(&context16,context,sizeof(context16));
 379
 380     CS_reg(&context16)  = HIWORD(callTarget);
 381     IP_reg(&context16)  = LOWORD(callTarget);
 382     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 383                            + (WORD)&((STACK16FRAME*)0)->bp;
 384
 385     argsize  = EBP_reg(context)-ESP_reg(context)-0x44;
 386     newstack = ((LPBYTE)THREAD_STACK16(thdb))-argsize;
 387     oldstack = (LPBYTE)ESP_reg(context)+4;
 388
 389     memcpy( newstack, oldstack, argsize );
 390
 391     for (i = 0; i < 32; i++)    /* NOTE: What about > 32 arguments? */
 392         if (mapESPrelative & (1 << i))
 393         {
 394             SEGPTR *arg = (SEGPTR *)(newstack + 2*i);
 395             *arg = PTR_SEG_OFF_TO_SEGPTR(SELECTOROF(thdb->cur_stack),
 396                                          OFFSETOF(thdb->cur_stack) - argsize
 397                                          + (*(LPBYTE *)arg - oldstack));
 398         }
 399
 400     EAX_reg(context) = Callbacks->CallRegisterShortProc( &context16, argsize );
 401     EDX_reg(context) = HIWORD(EAX_reg(context));
 402     EAX_reg(context) = LOWORD(EAX_reg(context));
 403 }
 404
 405 /**********************************************************************
 406  *              FT_ExitNN               (KERNEL32.218 - 232)
 407  *
 408  * One of the FT_ExitNN functions is called at the end of the thunk code.
 409  * It removes the stack frame created by FT_Prolog, moves the function
 410  * return from EBX to EAX (yes, FT_Thunk did use EAX for the return
 411  * value, but the thunk code has moved it from EAX to EBX in the
 412  * meantime ... :-), restores the caller's EBX, ESI, and EDI registers,
 413  * and perform a return to the CALLER of the thunk code (while removing
 414  * the given number of arguments from the caller's stack).
 415  */
 416
 417 static void FT_Exit(CONTEXT *context, int nPopArgs)
 418 {
 419     /* Return value is in EBX */
 420     EAX_reg(context) = EBX_reg(context);
 421
 422     /* Restore EBX, ESI, and EDI registers */
 423     EBX_reg(context) = *(DWORD *)(EBP_reg(context) -  4);
 424     ESI_reg(context) = *(DWORD *)(EBP_reg(context) -  8);
 425     EDI_reg(context) = *(DWORD *)(EBP_reg(context) - 12);
 426
 427     /* Clean up stack frame */
 428     ESP_reg(context) = EBP_reg(context);
 429     EBP_reg(context) = STACK32_POP(context);
 430
 431     /* Pop return address to CALLER of thunk code */
 432     EIP_reg(context) = STACK32_POP(context);
 433     /* Remove arguments */
 434     ESP_reg(context) += nPopArgs;
 435     /* Push return address back onto stack */
 436     STACK32_PUSH(context, EIP_reg(context));
 437 }
 438
 439 REGS_ENTRYPOINT(FT_Exit0)  { FT_Exit(context,  0); }
 440 REGS_ENTRYPOINT(FT_Exit4)  { FT_Exit(context,  4); }
 441 REGS_ENTRYPOINT(FT_Exit8)  { FT_Exit(context,  8); }
 442 REGS_ENTRYPOINT(FT_Exit12) { FT_Exit(context, 12); }
 443 REGS_ENTRYPOINT(FT_Exit16) { FT_Exit(context, 16); }
 444 REGS_ENTRYPOINT(FT_Exit20) { FT_Exit(context, 20); }
 445 REGS_ENTRYPOINT(FT_Exit24) { FT_Exit(context, 24); }
 446 REGS_ENTRYPOINT(FT_Exit28) { FT_Exit(context, 28); }
 447 REGS_ENTRYPOINT(FT_Exit32) { FT_Exit(context, 32); }
 448 REGS_ENTRYPOINT(FT_Exit36) { FT_Exit(context, 36); }
 449 REGS_ENTRYPOINT(FT_Exit40) { FT_Exit(context, 40); }
 450 REGS_ENTRYPOINT(FT_Exit44) { FT_Exit(context, 44); }
 451 REGS_ENTRYPOINT(FT_Exit48) { FT_Exit(context, 48); }
 452 REGS_ENTRYPOINT(FT_Exit52) { FT_Exit(context, 52); }
 453 REGS_ENTRYPOINT(FT_Exit56) { FT_Exit(context, 56); }
 454
 455
 456 /**********************************************************************
 457  *           WOWCallback16 (KERNEL32.62)(WOW32.2)
 458  * Calls a win16 function with a single DWORD argument.
 459  * RETURNS
 460  *      the return value
 461  */
 462 DWORD WINAPI WOWCallback16(
 463         FARPROC16 fproc,        /* [in] win16 function to call */
 464         DWORD arg               /* [in] single DWORD argument to function */
 465 ) {
 466         DWORD   ret;
 467         TRACE(thunk,"(%p,0x%08lx)...\n",fproc,arg);
 468         ret =  Callbacks->CallWOWCallbackProc(fproc,arg);
 469         TRACE(thunk,"... returns %ld\n",ret);
 470         return ret;
 471 }
 472
 473 /**********************************************************************
 474  *           WOWCallback16Ex (KERNEL32.55)(WOW32.3)
 475  * Calls a function in 16bit code.
 476  * RETURNS
 477  *      TRUE for success
 478  */
 479 BOOL WINAPI WOWCallback16Ex(
 480         FARPROC16 vpfn16,       /* [in] win16 function to call */
 481         DWORD dwFlags,          /* [in] flags */
 482         DWORD cbArgs,           /* [in] nr of arguments */
 483         LPVOID pArgs,           /* [in] pointer to arguments (LPDWORD) */
 484         LPDWORD pdwRetCode      /* [out] return value of win16 function */
 485 ) {
 486         return Callbacks->CallWOWCallback16Ex(vpfn16,dwFlags,cbArgs,pArgs,pdwRetCode);
 487 }
 488
 489 /***********************************************************************
 490  *              ThunkInitLS     (KERNEL32.43)
 491  * A thunkbuffer link routine
 492  * The thunkbuf looks like:
 493  *
 494  *      00: DWORD       length          ? don't know exactly
 495  *      04: SEGPTR      ptr             ? where does it point to?
 496  * The pointer ptr is written into the first DWORD of 'thunk'.
 497  * (probably correct implemented)
 498  * [ok probably]
 499  * RETURNS
 500  *      segmented pointer to thunk?
 501  */
 502 DWORD WINAPI ThunkInitLS(
 503         LPDWORD thunk,  /* [in] win32 thunk */
 504         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 505         DWORD len,      /* [in] thkbuffer length */
 506         LPCSTR dll16,   /* [in] name of win16 dll */
 507         LPCSTR dll32    /* [in] name of win32 dll (FIXME: not used?) */
 508 ) {
 509         LPDWORD         addr;
 510
 511         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 512                 return 0;
 513
 514         if (!addr[1])
 515                 return 0;
 516         *(DWORD*)thunk = addr[1];
 517
 518         return addr[1];
 519 }
 520
 521 /***********************************************************************
 522  *              Common32ThkLS   (KERNEL32.45)
 523  *
 524  * This is another 32->16 thunk, independent of the QT_Thunk/FT_Thunk
 525  * style thunks. The basic difference is that the parameter conversion
 526  * is done completely on the *16-bit* side here. Thus we do not call
 527  * the 16-bit target directly, but call a common entry point instead.
 528  * This entry function then calls the target according to the target
 529  * number passed in the DI register.
 530  *
 531  * Input:  EAX    SEGPTR to the common 16-bit entry point
 532  *         CX     offset in thunk table (target number * 4)
 533  *         DX     error return value if execution fails (unclear???)
 534  *         EDX.HI number of DWORD parameters
 535  *
 536  * (Note that we need to move the thunk table offset from CX to DI !)
 537  *
 538  * The called 16-bit stub expects its stack to look like this:
 539  *     ...
 540  *   (esp+40)  32-bit arguments
 541  *     ...
 542  *   (esp+8)   32 byte of stack space available as buffer
 543  *   (esp)     8 byte return address for use with 0x66 lret
 544  *
 545  * The called 16-bit stub uses a 0x66 lret to return to 32-bit code,
 546  * and uses the EAX register to return a DWORD return value.
 547  * Thus we need to use a special assembly glue routine
 548  * (CallRegisterLongProc instead of CallRegisterShortProc).
 549  *
 550  * Finally, we return to the caller, popping the arguments off
 551  * the stack.
 552  *
 553  * FIXME: The called function uses EBX to return the number of
 554  *        arguments that are to be popped off the caller's stack.
 555  *        This is clobbered by the assembly glue, so we simply use
 556  *        the original EDX.HI to get the number of arguments.
 557  *        (Those two values should be equal anyway ...?)
 558  *
 559  */
 560 REGS_ENTRYPOINT(Common32ThkLS)
 561 {
 562     CONTEXT context16;
 563     DWORD argsize;
 564     THDB *thdb = THREAD_Current();
 565
 566     memcpy(&context16,context,sizeof(context16));
 567
 568     DI_reg(&context16)  = CX_reg(context);
 569     CS_reg(&context16)  = HIWORD(EAX_reg(context));
 570     IP_reg(&context16)  = LOWORD(EAX_reg(context));
 571     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 572                            + (WORD)&((STACK16FRAME*)0)->bp;
 573
 574     argsize = HIWORD(EDX_reg(context)) * 4;
 575
 576     /* FIXME: hack for stupid USER32 CallbackGlueLS routine */
 577     if (EDX_reg(context) == EIP_reg(context))
 578         argsize = 6 * 4;
 579
 580     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 581             (LPBYTE)ESP_reg(context)+4, argsize );
 582
 583     EAX_reg(context) = Callbacks->CallRegisterLongProc(&context16, argsize + 32);
 584
 585     /* Clean up caller's stack frame */
 586
 587     EIP_reg(context) = STACK32_POP(context);
 588     ESP_reg(context) += argsize;
 589     STACK32_PUSH(context, EIP_reg(context));
 590 }
 591
 592 /***********************************************************************
 593  *              OT_32ThkLSF     (KERNEL32.40)
 594  *
 595  * YET Another 32->16 thunk. The difference to Common32ThkLS is that
 596  * argument processing is done on both the 32-bit and the 16-bit side:
 597  * The 32-bit side prepares arguments, copying them onto the stack.
 598  *
 599  * When this routine is called, the first word on the stack is the
 600  * number of argument bytes prepared by the 32-bit code, and EDX
 601  * contains the 16-bit target address.
 602  *
 603  * The called 16-bit routine is another relaycode, doing further
 604  * argument processing and then calling the real 16-bit target
 605  * whose address is stored at [bp-04].
 606  *
 607  * The call proceeds using a normal CallRegisterShortProc.
 608  * After return from the 16-bit relaycode, the arguments need
 609  * to be copied *back* to the 32-bit stack, since the 32-bit
 610  * relaycode processes output parameters.
 611  *
 612  * Note that we copy twice the number of arguments, since some of the
 613  * 16-bit relaycodes in SYSTHUNK.DLL directly access the original
 614  * arguments of the caller!
 615  *
 616  * (Note that this function seems only to be used for
 617  *  OLECLI32 -> OLECLI and OLESVR32 -> OLESVR thunking.)
 618  */
 619 REGS_ENTRYPOINT(OT_32ThkLSF)
 620 {
 621     CONTEXT context16;
 622     DWORD argsize;
 623     THDB *thdb = THREAD_Current();
 624
 625     memcpy(&context16,context,sizeof(context16));
 626
 627     CS_reg(&context16)  = HIWORD(EDX_reg(context));
 628     IP_reg(&context16)  = LOWORD(EDX_reg(context));
 629     EBP_reg(&context16) = OFFSETOF( thdb->cur_stack )
 630                            + (WORD)&((STACK16FRAME*)0)->bp;
 631
 632     argsize = 2 * *(WORD *)(ESP_reg(context) + 4) + 2;
 633
 634     memcpy( ((LPBYTE)THREAD_STACK16(thdb))-argsize,
 635             (LPBYTE)ESP_reg(context)+4, argsize );
 636
 637     EAX_reg(context) = Callbacks->CallRegisterShortProc(&context16, argsize);
 638
 639     memcpy( (LPBYTE)ESP_reg(context)+4,
 640             ((LPBYTE)THREAD_STACK16(thdb))-argsize, argsize );
 641 }
 642
 643 /***********************************************************************
 644  *              ThunkInitLSF            (KERNEL32.41)
 645  * A thunk setup routine.
 646  * Expects a pointer to a preinitialized thunkbuffer in the first argument
 647  * looking like:
 648  *      00..03:         unknown (pointer, check _41, _43, _46)
 649  *      04: EB1E                jmp +0x20
 650  *
 651  *      06..23:         unknown (space for replacement code, check .90)
 652  *
 653  *      24:>E800000000          call offset 29
 654  *      29:>58                  pop eax            ( target of call )
 655  *      2A: 2D25000000          sub eax,0x00000025 ( now points to offset 4 )
 656  *      2F: BAxxxxxxxx          mov edx,xxxxxxxx
 657  *      34: 68yyyyyyyy          push KERNEL32.90
 658  *      39: C3                  ret
 659  *
 660  *      3A: EB1E                jmp +0x20
 661  *      3E ... 59:      unknown (space for replacement code?)
 662  *      5A: E8xxxxxxxx          call <32bitoffset xxxxxxxx>
 663  *      5F: 5A                  pop edx
 664  *      60: 81EA25xxxxxx        sub edx, 0x25xxxxxx
 665  *      66: 52                  push edx
 666  *      67: 68xxxxxxxx          push xxxxxxxx
 667  *      6C: 68yyyyyyyy          push KERNEL32.89
 668  *      71: C3                  ret
 669  *      72: end?
 670  * This function checks if the code is there, and replaces the yyyyyyyy entries
 671  * by the functionpointers.
 672  * The thunkbuf looks like:
 673  *
 674  *      00: DWORD       length          ? don't know exactly
 675  *      04: SEGPTR      ptr             ? where does it point to?
 676  * The segpointer ptr is written into the first DWORD of 'thunk'.
 677  * [ok probably]
 678  * RETURNS
 679  *      unclear, pointer to win16 thkbuffer?
 680  */
 681 LPVOID WINAPI ThunkInitLSF(
 682         LPBYTE thunk,   /* [in] win32 thunk */
 683         LPCSTR thkbuf,  /* [in] thkbuffer name in win16 dll */
 684         DWORD len,      /* [in] length of thkbuffer */
 685         LPCSTR dll16,   /* [in] name of win16 dll */
 686         LPCSTR dll32    /* [in] name of win32 dll */
 687 ) {
 688         HMODULE hkrnl32 = GetModuleHandleA("KERNEL32");
 689         LPDWORD         addr,addr2;
 690
 691         /* FIXME: add checks for valid code ... */
 692         /* write pointers to kernel32.89 and kernel32.90 (+ordinal base of 1) */
 693         *(DWORD*)(thunk+0x35) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)90);
 694         *(DWORD*)(thunk+0x6D) = (DWORD)GetProcAddress(hkrnl32,(LPSTR)89);
 695
 696
 697         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 698                 return 0;
 699
 700         addr2 = PTR_SEG_TO_LIN(addr[1]);
 701         if (HIWORD(addr2))
 702                 *(DWORD*)thunk = (DWORD)addr2;
 703
 704         return addr2;
 705 }
 706
 707 /***********************************************************************
 708  *              FT_PrologPrime                  (KERNEL32.89)
 709  *
 710  * This function is called from the relay code installed by
 711  * ThunkInitLSF. It replaces the location from where it was
 712  * called by a standard FT_Prolog call stub (which is 'primed'
 713  * by inserting the correct target table pointer).
 714  * Finally, it calls that stub.
 715  *
 716  * Input:  ECX    target number + flags (passed through to FT_Prolog)
 717  *        (ESP)   offset of location where target table pointer
 718  *                is stored, relative to the start of the relay code
 719  *        (ESP+4) pointer to start of relay code
 720  *                (this is where the FT_Prolog call stub gets written to)
 721  *
 722  * Note: The two DWORD arguments get popped from the stack.
 723  *
 724  */
 725 REGS_ENTRYPOINT(FT_PrologPrime)
 726 {
 727     DWORD  targetTableOffset = STACK32_POP(context);
 728     LPBYTE relayCode = (LPBYTE)STACK32_POP(context);
 729     DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
 730     DWORD  targetNr = LOBYTE(ECX_reg(context));
 731
 732     _write_ftprolog(relayCode, targetTable);
 733
 734     /* We should actually call the relay code now, */
 735     /* but we skip it and go directly to FT_Prolog */
 736     EDX_reg(context) = targetTable[targetNr];
 737     __regs_FT_Prolog(context);
 738 }
 739
 740 /***********************************************************************
 741  *              QT_ThunkPrime                   (KERNEL32.90)
 742  *
 743  * This function corresponds to FT_PrologPrime, but installs a
 744  * call stub for QT_Thunk instead.
 745  *
 746  * Input: (EBP-4) target number (passed through to QT_Thunk)
 747  *         EDX    target table pointer location offset
 748  *         EAX    start of relay code
 749  *
 750  */
 751 REGS_ENTRYPOINT(QT_ThunkPrime)
 752 {
 753     DWORD  targetTableOffset = EDX_reg(context);
 754     LPBYTE relayCode = (LPBYTE)EAX_reg(context);
 755     DWORD *targetTable = *(DWORD **)(relayCode+targetTableOffset);
 756     DWORD  targetNr = LOBYTE(*(DWORD *)(EBP_reg(context) - 4));
 757
 758     _write_qtthunk(relayCode, targetTable);
 759
 760     /* We should actually call the relay code now, */
 761     /* but we skip it and go directly to QT_Thunk */
 762     EDX_reg(context) = targetTable[targetNr];
 763     __regs_QT_Thunk(context);
 764 }
 765
 766 /***********************************************************************
 767  *                                                      (KERNEL32.46)
 768  * Another thunkbuf link routine.
 769  * The start of the thunkbuf looks like this:
 770  *      00: DWORD       length
 771  *      04: SEGPTR      address for thunkbuffer pointer
 772  * [ok probably]
 773  */
 774 VOID WINAPI ThunkInitSL(
 775         LPBYTE thunk,           /* [in] start of thunkbuffer */
 776         LPCSTR thkbuf,          /* [in] name/ordinal of thunkbuffer in win16 dll */
 777         DWORD len,              /* [in] length of thunkbuffer */
 778         LPCSTR dll16,           /* [in] name of win16 dll containing the thkbuf */
 779         LPCSTR dll32            /* [in] win32 dll. FIXME: strange, unused */
 780 ) {
 781         LPDWORD         addr;
 782
 783         if (!(addr = _loadthunk( dll16, thkbuf, dll32, NULL, len )))
 784                 return;
 785
 786         *(DWORD*)PTR_SEG_TO_LIN(addr[1]) = (DWORD)thunk;
 787 }
 788
 789 /**********************************************************************
 790  *           SSInit             KERNEL.700
 791  * RETURNS
 792  *      TRUE for success.
 793  */
 794 BOOL WINAPI SSInit16()
 795 {
 796     return TRUE;
 797 }
 798
 799 /**********************************************************************
 800  *           SSOnBigStack       KERNEL32.87
 801  * Check if thunking is initialized (ss selector set up etc.)
 802  * We do that differently, so just return TRUE.
 803  * [ok]
 804  * RETURNS
 805  *      TRUE for success.
 806  */
 807 BOOL WINAPI SSOnBigStack()
 808 {
 809     TRACE(thunk, "Yes, thunking is initialized\n");
 810     return TRUE;
 811 }
 812
 813 /**********************************************************************
 814  *           SSCall
 815  * One of the real thunking functions. This one seems to be for 32<->32
 816  * thunks. It should probably be capable of crossing processboundaries.
 817  *
 818  * And YES, I've seen nr=48 (somewhere in the Win95 32<->16 OLE coupling)
 819  * [ok]
 820  */
 821 DWORD WINAPIV SSCall(
 822         DWORD nr,       /* [in] number of argument bytes */
 823         DWORD flags,    /* [in] FIXME: flags ? */
 824         FARPROC fun,    /* [in] function to call */
 825         ...             /* [in/out] arguments */
 826 ) {
 827     DWORD i,ret;
 828     DWORD *args = ((DWORD *)&fun) + 1;
 829
 830     if(TRACE_ON(thunk)){
 831       dbg_decl_str(thunk, 256);
 832       for (i=0;i<nr/4;i++)
 833         dsprintf(thunk,"0x%08lx,",args[i]);
 834       TRACE(thunk,"(%ld,0x%08lx,%p,[%s])\n",
 835                     nr,flags,fun,dbg_str(thunk));
 836     }
 837     switch (nr) {
 838     case 0:     ret = fun();
 839                 break;
 840     case 4:     ret = fun(args[0]);
 841                 break;
 842     case 8:     ret = fun(args[0],args[1]);
 843                 break;
 844     case 12:    ret = fun(args[0],args[1],args[2]);
 845                 break;
 846     case 16:    ret = fun(args[0],args[1],args[2],args[3]);
 847                 break;
 848     case 20:    ret = fun(args[0],args[1],args[2],args[3],args[4]);
 849                 break;
 850     case 24:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5]);
 851                 break;
 852     case 28:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
 853                 break;
 854     case 32:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
 855                 break;
 856     case 36:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
 857                 break;
 858     case 40:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9]);
 859                 break;
 860     case 44:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10]);
 861                 break;
 862     case 48:    ret = fun(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8],args[9],args[10],args[11]);
 863                 break;
 864     default:
 865         WARN(thunk,"Unsupported nr of arguments, %ld\n",nr);
 866         ret = 0;
 867         break;
 868
 869     }
 870     TRACE(thunk," returning %ld ...\n",ret);
 871     return ret;
 872 }
 873
 874 /**********************************************************************
 875  *           W32S_BackTo32                      (KERNEL32.51)
 876  */
 877 REGS_ENTRYPOINT(W32S_BackTo32)
 878 {
 879     LPDWORD stack = (LPDWORD)ESP_reg( context );
 880     FARPROC proc = (FARPROC) stack[0];
 881
 882     EAX_reg( context ) = proc( stack[2], stack[3], stack[4], stack[5], stack[6],
 883                                stack[7], stack[8], stack[9], stack[10], stack[11] );
 884
 885     EIP_reg( context ) = stack[1];
 886 }
 887
 888 /**********************************************************************
 889  *                      AllocSLCallback         (KERNEL32)
 890  *
 891  * Win95 uses some structchains for callbacks. It allocates them
 892  * in blocks of 100 entries, size 32 bytes each, layout:
 893  * blockstart:
 894  *      0:      PTR     nextblockstart
 895  *      4:      entry   *first;
 896  *      8:      WORD    sel ( start points to blockstart)
 897  *      A:      WORD    unknown
 898  * 100xentry:
 899  *      00..17:         Code
 900  *      18:     PDB     *owning_process;
 901  *      1C:     PTR     blockstart
 902  *
 903  * We ignore this for now. (Just a note for further developers)
 904  * FIXME: use this method, so we don't waste selectors...
 905  *
 906  * Following code is then generated by AllocSLCallback. The code is 16 bit, so
 907  * the 0x66 prefix switches from word->long registers.
 908  *
 909  *      665A            pop     edx
 910  *      6668x arg2 x    pushl   <arg2>
 911  *      6652            push    edx
 912  *      EAx arg1 x      jmpf    <arg1>
 913  *
 914  * returns the startaddress of this thunk.
 915  *
 916  * Note, that they look very similair to the ones allocates by THUNK_Alloc.
 917  * RETURNS
 918  *      segmented pointer to the start of the thunk
 919  */
 920 DWORD WINAPI
 921 AllocSLCallback(
 922         DWORD finalizer,        /* [in] finalizer function */
 923         DWORD callback          /* [in] callback function */
 924 ) {
 925         LPBYTE  x,thunk = HeapAlloc( GetProcessHeap(), 0, 32 );
 926         WORD    sel;
 927
 928         x=thunk;
 929         *x++=0x66;*x++=0x5a;                            /* popl edx */
 930         *x++=0x66;*x++=0x68;*(DWORD*)x=finalizer;x+=4;  /* pushl finalizer */
 931         *x++=0x66;*x++=0x52;                            /* pushl edx */
 932         *x++=0xea;*(DWORD*)x=callback;x+=4;             /* jmpf callback */
 933
 934         *(PDB**)(thunk+18) = PROCESS_Current();
 935
 936         sel = SELECTOR_AllocBlock( thunk , 32, SEGMENT_CODE, FALSE, FALSE );
 937         return (sel<<16)|0;
 938 }
 939
 940 /**********************************************************************
 941  *              FreeSLCallback          (KERNEL32.274)
 942  * Frees the specified 16->32 callback
 943  */
 944 void WINAPI
 945 FreeSLCallback(
 946         DWORD x /* [in] 16 bit callback (segmented pointer?) */
 947 ) {
 948         FIXME(win32,"(0x%08lx): stub\n",x);
 949 }
 950
 951
 952 /**********************************************************************
 953  *              GetTEBSelectorFS        (KERNEL.475)
 954  *      Set the 16-bit %fs to the 32-bit %fs (current TEB selector)
 955  */
 956 VOID WINAPI GetTEBSelectorFS16( CONTEXT *context )
 957 {
 958     GET_FS( FS_reg(context) );
 959 }
 960
 961 /**********************************************************************
 962  *              KERNEL_431              (KERNEL.431)
 963  *              IsPeFormat              (W32SYS.2)
 964  * Checks the passed filename if it is a PE format executeable
 965  * RETURNS
 966  *  TRUE, if it is.
 967  *  FALSE if not.
 968  */
 969 BOOL16 WINAPI IsPeFormat16(
 970         LPSTR   fn,     /* [in] filename to executeable */
 971         HFILE16 hf16    /* [in] open file, if filename is NULL */
 972 ) {
 973         IMAGE_DOS_HEADER        mzh;
 974         HFILE                 hf=FILE_GetHandle(hf16);
 975         OFSTRUCT                ofs;
 976         DWORD                   xmagic;
 977
 978         if (fn) {
 979                 hf = OpenFile(fn,&ofs,OF_READ);
 980                 if (hf==HFILE_ERROR)
 981                         return FALSE;
 982         }
 983         _llseek(hf,0,SEEK_SET);
 984         if (sizeof(mzh)!=_lread(hf,&mzh,sizeof(mzh))) {
 985                 _lclose(hf);
 986                 return FALSE;
 987         }
 988         if (mzh.e_magic!=IMAGE_DOS_SIGNATURE) {
 989                 WARN(dosmem,"File has not got dos signature!\n");
 990                 _lclose(hf);
 991                 return FALSE;
 992         }
 993         _llseek(hf,mzh.e_lfanew,SEEK_SET);
 994         if (sizeof(DWORD)!=_lread(hf,&xmagic,sizeof(DWORD))) {
 995                 _lclose(hf);
 996                 return FALSE;
 997         }
 998         _lclose(hf);
 999         return (xmagic == IMAGE_NT_SIGNATURE);
1000 }
1001
1002 /***********************************************************************
1003  *           WOWHandle32                        (KERNEL32.57)(WOW32.16)
1004  * Converts a win16 handle of type into the respective win32 handle.
1005  * We currently just return this handle, since most handles are the same
1006  * for win16 and win32.
1007  * RETURNS
1008  *      The new handle
1009  */
1010 HANDLE WINAPI WOWHandle32(
1011         WORD handle,            /* [in] win16 handle */
1012         WOW_HANDLE_TYPE type    /* [in] handle type */
1013 ) {
1014         TRACE(win32,"(0x%04x,%d)\n",handle,type);
1015         return (HANDLE)handle;
1016 }
1017
1018 /***********************************************************************
1019  *           K32Thk1632Prolog                   (KERNEL32.492)
1020  */
1021 REGS_ENTRYPOINT(K32Thk1632Prolog)
1022 {
1023    LPBYTE code = (LPBYTE)EIP_reg(context) - 5;
1024
1025    /* Arrrgh! SYSTHUNK.DLL just has to re-implement another method
1026       of 16->32 thunks instead of using one of the standard methods!
1027       This means that SYSTHUNK.DLL itself switches to a 32-bit stack,
1028       and does a far call to the 32-bit code segment of OLECLI32/OLESVR32.
1029       Unfortunately, our CallTo/CallFrom mechanism is therefore completely
1030       bypassed, which means it will crash the next time the 32-bit OLE
1031       code thunks down again to 16-bit (this *will* happen!).
1032
1033       The following hack tries to recognize this situation.
1034       This is possible since the called stubs in OLECLI32/OLESVR32 all
1035       look exactly the same:
1036         00   E8xxxxxxxx    call K32Thk1632Prolog
1037         05   FF55FC        call [ebp-04]
1038         08   E8xxxxxxxx    call K32Thk1632Epilog
1039         0D   66CB          retf
1040
1041       If we recognize this situation, we try to simulate the actions
1042       of our CallTo/CallFrom mechanism by copying the 16-bit stack
1043       to our 32-bit stack, creating a proper STACK16FRAME and
1044       updating thdb->cur_stack. */
1045
1046    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1047        && code[13] == 0x66 && code[14] == 0xCB)
1048    {
1049       WORD  stackSel  = NtCurrentTeb()->stack_sel;
1050       DWORD stackBase = GetSelectorBase(stackSel);
1051
1052       THDB *thdb = THREAD_Current();
1053       DWORD argSize = EBP_reg(context) - ESP_reg(context);
1054       char *stack16 = (char *)ESP_reg(context);
1055       char *stack32 = (char *)thdb->cur_stack - argSize;
1056       STACK16FRAME *frame16 = (STACK16FRAME *)stack16 - 1;
1057
1058       TRACE(thunk, "before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1059                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1060
1061       memset(frame16, '\0', sizeof(STACK16FRAME));
1062       frame16->frame32 = (STACK32FRAME *)thdb->cur_stack;
1063       frame16->ebp = EBP_reg(context);
1064
1065       memcpy(stack32, stack16, argSize);
1066       thdb->cur_stack = PTR_SEG_OFF_TO_SEGPTR(stackSel, (DWORD)frame16 - stackBase);
1067
1068       ESP_reg(context) = (DWORD)stack32;
1069       EBP_reg(context) = ESP_reg(context) + argSize;
1070
1071       TRACE(thunk, "after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1072                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1073    }
1074
1075    SYSLEVEL_ReleaseWin16Lock();
1076 }
1077
1078 /***********************************************************************
1079  *           K32Thk1632Epilog                   (KERNEL32.491)
1080  */
1081 REGS_ENTRYPOINT(K32Thk1632Epilog)
1082 {
1083    LPBYTE code = (LPBYTE)EIP_reg(context) - 13;
1084
1085    SYSLEVEL_RestoreWin16Lock();
1086
1087    /* We undo the SYSTHUNK hack if necessary. See K32Thk1632Prolog. */
1088
1089    if (   code[5] == 0xFF && code[6] == 0x55 && code[7] == 0xFC
1090        && code[13] == 0x66 && code[14] == 0xCB)
1091    {
1092       THDB *thdb = THREAD_Current();
1093       STACK16FRAME *frame16 = (STACK16FRAME *)PTR_SEG_TO_LIN(thdb->cur_stack);
1094       char *stack16 = (char *)(frame16 + 1);
1095       DWORD argSize = frame16->ebp - (DWORD)stack16;
1096       char *stack32 = (char *)frame16->frame32 - argSize;
1097
1098       DWORD nArgsPopped = ESP_reg(context) - (DWORD)stack32;
1099
1100       TRACE(thunk, "before SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1101                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1102
1103       thdb->cur_stack = (DWORD)frame16->frame32;
1104
1105       ESP_reg(context) = (DWORD)stack16 + nArgsPopped;
1106       EBP_reg(context) = frame16->ebp;
1107
1108       TRACE(thunk, "after  SYSTHUNK hack: EBP: %08lx ESP: %08lx cur_stack: %08lx\n",
1109                    EBP_reg(context), ESP_reg(context), thdb->cur_stack);
1110    }
1111 }
1112
1113 /***********************************************************************
1114  *           UpdateResource32A                 (KERNEL32.707)
1115  */
1116 BOOL WINAPI UpdateResourceA(
1117   HANDLE  hUpdate,
1118   LPCSTR  lpType,
1119   LPCSTR  lpName,
1120   WORD    wLanguage,
1121   LPVOID  lpData,
1122   DWORD   cbData) {
1123
1124   FIXME(win32, ": stub\n");
1125   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1126   return FALSE;
1127 }
1128
1129 /***********************************************************************
1130  *           UpdateResource32W                 (KERNEL32.708)
1131  */
1132 BOOL WINAPI UpdateResourceW(
1133   HANDLE  hUpdate,
1134   LPCWSTR lpType,
1135   LPCWSTR lpName,
1136   WORD    wLanguage,
1137   LPVOID  lpData,
1138   DWORD   cbData) {
1139
1140   FIXME(win32, ": stub\n");
1141   SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1142   return FALSE;
1143 }
1144
1145
1146 /***********************************************************************
1147  *           WaitNamedPipe32A                 [KERNEL32.725]
1148  */
1149 BOOL WINAPI WaitNamedPipeA (LPCSTR lpNamedPipeName, DWORD nTimeOut)
1150 {       FIXME (win32,"%s 0x%08lx\n",lpNamedPipeName,nTimeOut);
1151         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1152         return FALSE;
1153 }
1154 /***********************************************************************
1155  *           WaitNamedPipe32W                 [KERNEL32.726]
1156  */
1157 BOOL WINAPI WaitNamedPipeW (LPCWSTR lpNamedPipeName, DWORD nTimeOut)
1158 {       FIXME (win32,"%s 0x%08lx\n",debugstr_w(lpNamedPipeName),nTimeOut);
1159         SetLastError(ERROR_PIPE_NOT_CONNECTED);
1160         return FALSE;
1161 }
1162
1163 /*********************************************************************
1164  *                   PK16FNF [KERNEL32.91]
1165  *
1166  *  This routine fills in the supplied 13-byte (8.3 plus terminator)
1167  *  string buffer with the 8.3 filename of a recently loaded 16-bit
1168  *  module.  It is unknown exactly what modules trigger this
1169  *  mechanism or what purpose this serves.  Win98 Explorer (and
1170  *  probably also Win95 with IE 4 shell integration) calls this
1171  *  several times during initialization.
1172  *
1173  *  FIXME: find out what this really does and make it work.
1174  */
1175 void WINAPI PK16FNF(LPSTR strPtr)
1176 {
1177        FIXME(win32, "(%p): stub\n", strPtr);
1178
1179        /* fill in a fake filename that'll be easy to recognize */
1180        lstrcpyA(strPtr, "WINESTUB.FIX");
1181 }